Cloud computing is to handle enormous enterprise computing, hardware, storage needs as a collection of virtually massive distributed large scale computers. An exponential advancement of communication and information technologies which results in substantial traffic for accessing the cloud resources wired and mobile, through various communication devices as desktop, laptop, tabs, etc. Demands for reliable and low cost authentication a technique is signified by enterprise data also increased access rates from low-resource terminal devices. With varied efficiencies lots of researchers have proposed an authentication scheme, which is based on password, biometric, steganography etc. In 2014, Nimmy et al proposed a steganography system based cloud computing in mutual authentication protocol and claimed that their scheme resists major cryptographic attacks. We will show that Nimmy et al is vulnerable to offline password attack guessing and Service attack. As a part of our contribution, for asymmetric cloud computing environment we propose a low cost steganography is based on authentication scheme which is strongly secure and best suited.